[314]

What kind of latency would this introduce on packet processing? A context switch used to be measured in microseconds. I don't have a linux system here to run lmbench on, and I wonder what the level of latency would be on a modern system.

[fulafel]

Current everyday networking has tens-of-microseconds latency[1] and on 2018 era CPUs the context switch overhead seems to be 1-2.5 microseconds[2]. So in benchmark and specialized use cases, context switch overhead would be measurable but many orders of magntude away from relevant when talking about communication over the internet.

[1] https://blog.cloudflare.com/how-to-achieve-low-latency/ - 30-45 microseconds on plain 10G ethernet - faster ethernet probably wouldn't improve much on this

[2] https://eli.thegreenplace.net/2018/measuring-context-switchi...